Uncovered an issue with my pump the last two brew days. I have a chugger SS head pump (hope this threads ok, not a march pump?). The pump has worked great for 5+ years but the last two runs it will periodically stop pumping fluid though I still hear the motor running. It seems to go to a higher pitch when this happens. I turn it off, give it a few minutes rest, and it works again- for awhile, until the same process happens again. I have an electric single tier setup and continuously recirc thru the entire mash with a heat exchanger in the HLT. I did do a hop stand at 190 x 30min the first brew day it malfunctioned. Could cycling the extra high temps for so long have damaged it? Figure it’s time to take it apart and see what’s potentially going on inside.